1999 HONDA CIVIC Gauges

D
Dashboard Wire Harness
Connector ol
Terminal
Numbel of
CavitiesLocationConnects toNotes
c501
c502
c503
c504
c505
c507
c508
c509
c510
c513
c514
c515
c516
c518
c519
c520
20
24
to
12
5
3
20
5
5
14
r0
5
20
22
5
2
5
Behind dashboard lower panel
Above under-dash luse/relay box
Above under dash Iuse/relay box
Above under dash tuse/relay box
Left side of steering wheel
Left side of steering wheel
Below gauges
Behind gauges
Behind gauges
Behind gauges
Behind gauges
Behind gauges
Right side ot gauges
Right side oI gauges
Beh ind middle of dash
Behind middle of dash
Behind middle of dash
Behind middle of dash
Behind middle of dash
Behind middle of dash
Behind gauges
Under-dash {use/relay box (C912)
Main wire harness 1C411)
Floor wire harness (C553)
Main wire harness (C410)
Cruise main switch
Dash lights brightness controller
Junction connector
Gauge assembly
Gauge assembly
Gauge assembly
Gauge assembly
Gauge assembly
Hazard warning switch
Rear window defogger switch
Audio unit (Keyless receiver circuit)
Audio unit
Security control unit
Audio unit
Security system
Accessory power outlet
Gauge assembly
A"r
SRS
A,/r
Optio nal*'
Option al*'
ABS
G501Under middle ol dashBody ground, via dashboard wire harness
*1: With shiit-up indicator or cruise control system ('96 - 97 models)
With cruise control system ('98 model)
c509 C511 c510 c515
13 lc5l7
*2: '96 98 models*3: '99 - 00 models
c508
DASHSOARD WIREHARNESS
c501
c520
c502 c504
23-39

Contents
How to Use This Manual ICircuit Schematics (see Circuit Index)Fuse/Relaylnformation 6Ground-to-Componentslndex 6-6ComponentLocationPhotooraohs 201Conriector Views 202
Circuit Index
Accessory power socket 155Air conditionerAir delivery'96198 models 61'99-'00 models 61-2Blower controls'96198 models 60'99100 models 60-1Compressor controls 62Fans 63Anti-lock brake system (ABS) 44A/T gear position indicatorCVT 89All except CVT 89-1Automatic transmission controlsAll '96-'98 models except CVT and GX 39All '99100 models except CVT 39-8All GX models 39-8'96-'98 CVT 39-4'99100 cw 39-12Back-up lightsCoupe and Sedan 110Hatchback l'10-1Brake lightsAll Coupes and'96-'98 Sedans 110-15'99-'00 Sedans 110-16Hatchback 110-17Brake system indicator light'96198 models 7'1'99100 models 71-1Ceiling light 114-3Charging system 22Condenser fan 63Console lights 114Cruise control 34Dash lights 114Daytime running lights 110- 13Engine coolant temperature gauge 81-1Fog lights 110-10Front parking lights 110-2Fuel gauge 81-1Fuse/relay boxUnder-dash 6Under-hood 6-4Underhood ABS 6-3Gauges 81Ground distribution 14Ground-to-Componentslndex 6-6Hazard warning lightsAll except '99100 Sedans 110-6'99100 Sedans 110-8Headlights 110-12Headlight switch 100Heater - See Air ConditionerHorn'96197 models 40'98 model 40-1'99100 models 40-2lgnition key reminder 73lgnition systemAll '96198 models except Dl685 20All '99100 models except D16Y5 with Mn 2O-2All D1685 engines 20-2'99-'00 D 16Y5 with M/T 20
lndicators 80Integrated control unit 70lnterlock systemAll except'96J98 CVT 138'96198CVT 138-1License plate lightsAll Coupes and '96-'98 Sedans I l0-3'99100 Sedans 1 10-4Hatchback 110-5Low fuel indicator light 74Moonrool'96197 models |22'98-'00 models 122-1Odometer 81Oil pressure indicator light 80-3Power distributionBattery to ignition switch, fuses, and relaysFuses to relays and components 10-2Power door locksAll models without keyless entry 130'96-'98 models with keyless entry 130-2'99100 models with keyless entry 130-12Power mirrorsWithout detogger 141With defogger '141-2
Power windows 120Programmed fuel injection system (PGNr-Fl)All '96-98 models except D1685 23All '99-'00 models except D16Y5with M/T and D1685 24All D1685 engines 25'99100 D16Y5 with M/T 23Radiator fan 63Rear window defogger'96-,98 models 64'99100 models 64-1Seat belt reminder 73Security system'96.'98 USA HX, LX, EX 133'96-'98 Canada EX, Si 133'99TOO USA HX, LX, EX, DX.V Si 133-4'99100 Canada EX, Si 133-4All CX and DX models 133-8Speedometer 81Starting systemA./T (All except Dl685) 21A"/r (D16Bs) 21-1Manualtransmission 21-2Slereo sound system 150Supplemental rastraint system (SRS) 47Tachometer 81TailliqhtsAllboupes and'96-'98 Sedans 110-3'99100 Sedans 1 10-4Hatchback 110-5Trunk light 114-3Turn signal lightsAll except'99100 Sedans 110-6'99-'00 Sedans 1 10-8Vehicle speed sensor (VSS) 33Wiper/washerFront 91Rear 92
10

How To Use This Manual
Symbols
oo
Wire Color Abbreviations
The following abbreviations are used to
identify wire colors in the circuit schematics:
BLK.... .........b|ack
BLU.... ......... blue
BRN.... ,....... brown
GRN.... ........ green
GRY.... ......,.. gray
LTBLU . .....lightbtue
LTGRN. ....lightgreen
ORN.... ....... orange
PNK .... .......,.. pink
PUR .... ........ purple
RED .... .......... red
WHT... .........white
YEL .... ........ yellow
A broken line means this part of the circuit
is not shown; refer to the circuit listed for
the complete schematic.
"ral
o
-.1
See GroundDistribution,page 141.
I G101
Where separate wires
join, only the splice is
shown; for details on
the additional wiring,
refer to the circuits
listed.ili::i
{[
UNDER-OASHFUSE/RELAYBOX
Wires
A wavy line at the end of
a wire means lhe wire is
broken by the binding of
the book or by a "choice"
bracket but continues on
the next page.
Wire insulation can be
one color, or one color
with another color stripe.
(The second color is
the stripe.)
This circuit continues on
another page. (The arrow
shows direction o{ current
flow.) To tollow the RED/
BLK wire in this example,
you would turn to page 23-5
and look for the "2" anow.
This means the branch of the
wire connects to another
circuit. The arrow Doints to the
name of the circuit branch
where the wire continues.
8LK-Cruise Control, €aaaGauges, Indrcalors
!YEUsLK
Ttl
Wire choices for options or
different models are labeled
and shown with a "choice"
bracket like this.
This broken line means
both terminals are in
connector C134.
a.
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ryil;::,
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:-lName of Circuit

Connectors - "C"
The cavities (and wire terminals) in each
connector are numbered starting from the
upper left, looking at the male terminals trom
the terminal side (or looking at the female
lerminals f rom the wire side. Both views are in
the same direction so the numbers are the
same.) All actual cavities are numbered, even
if they have no wire terminals in them.
Terminal SldeolMale Tsrminals
{
T
_A
Wlre SldeotFemalg Trrmlnala
The connector cavity number is listed next to
each terminal on the circuit schematic. The
cavity/terminal shown below is #6.
Terminal
This means the connector
connects directly to the
componenr.
This means the connector
connects to a lead (pigtail)
wired directly to the
component.
Cavlty/Termlnsl 6
only the one affecting that
ciriuit will be shown. The f
--f
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I
Remaining wires to
the same bus are
represented by a
broken line.
The name of the
component appears next
to its upper right corner
followed by notes about
its function.
This symbol represents
one bus inside the cao of a
iunction connector. A \
lr"ctb. connectorcap |contains several buses, but Ac103
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See Gauges
Splices
Solices are shown as a dot. Their location
and the number of wires may vary
depending on the harness manufacturer.
Components
A solid border line means the
entire component is shown.
A broken border line indicales
that only part of the component
is shown.
t_J
ll
ll
BRAXEswtTcHClosed wilhpedaldepressed.

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snsIXDICATORLIG}IT
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GAUGEASSEMBLYPHOIO 67vlEw 71=[ =
See ABS
*l =
See sRs
c507(Termlnals 1.6)
vlEw 56
BLU/NED
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Groufte 14-7.Distribtltion,Ground,14-7.S€e (page
(cont'd)
80-1
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- G4o1PHOIO 57

Gauges
#'t----lllgi' i i-r-; ffiffig'i
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ild;$ i fr{li,l[i
1 OTSTR|BUTOR r--- --.-^'l POWERTRATN
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c442
#* i ;[. r;{ 11;:#r i :;l i1[---- 11 :ff:*"'"'
'i" f+Taj i!!3lo_rrr."
SeeIndicators---{
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S€€ GroundOistribution,page 1+7.
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SPEEDOMElER

Gauges (cont'd)
- How the Gircuit Works
When the ignition switch is in ON (ll) or START (lll),
battery voltage is supplied through fuse 25 to the
gauges in the gauge assembly.
Speedometer and Odometer
The odometer and soeedometer drive circuits
receive pulses from the vehicle speed sensor
(VSS). The pulse rate increases as the car
accelerates. The frequency and duration of these
input pulses are measured and displayed by the
speedometer, odometer and tripmeter.
Tachometer
The tachometer drive circuit receives pulses from
the ignition control module (lCM) in the distributor
assembly or the ECM/PCM. The solid-state
lachometer then displays these pulses as engine
speed. For each 200 pulses per minute from the
ignition control modul€ (lCM) or the ECM/PCM, the
tachometer displays 100 RPM.
Engine Coolant Temperature Gauge
The engine coolant temperature gauge has two
intersecting coils wound around a permanent
magnet rotor. Voltage applied to the coils, through
fuse 25, generates a magnetic lield. The magnetic
field, controlled by the coolant temperature sending
unit, causes the rotor to rotate and the gauge
needle to move. As the resistance in the sending
unit varies, current through the gauge coils
changes. The gauge needle moves toward the coil
with the strongest magnetic field.
The 6ngine coolant temperature sending unit's
resistance varies from about 137 ohms at low
engine temperature to between 3H6 ohms at high
temperature (radiator fan running).
Refer to the Service Manual (Section 23, Electrical)
for specific tests or troubleshooting procedures.
81-2
(
Fuel Gauge (All except cX)
The fuel gauge has two intersecting coils wound
around a permanent magnet rotor. Voltage applied
to the coils, through tuse 25, generates a magnetic
field. The magnetic field, controlled by the fuel
gauge sending unit, causes the rotor to rotate and
the gauge needle to move. As the resislance in the
sending unit varies, current through the gauge coils
changes. The gauge needle moves toward the coil
with the strongest magnetic field.
The fuel gauge sending unit's resistance varies
from about 2-5 ohms at full, to about 110 ohms at
empty. When you turn the ignition switch off, the
gauge remains at the last reading until you turn the
ignition switch to ON (ll) or START (lll) again,
Refer to the Service Manual (Section 23, Electrical)
for specific tests or troubleshooting procedures.
Fuel Gauge (GX)
The fuel gauge has two intersecting coils wound
around a permanent magnet rotor. Voltage applied
to the coils, through fuse 25, generates a magnetic
field. The magnetic field, controlled by the PCM,
causes the rotor to rotate and the gauge needle to
move. The PCM calculates the gas quantity in the
fuel tank by using the fuel pressure value detected
by the tuel tank pressure sensor and the fuel
temperature value detected by the fuel tank
temperalure sensor, and outputs the signal to the
gauge assembly. The gauge needle moves toward
the coil with the strongest magnetic field.
When you turn the ignition switch off , the gauge
remains at the last reading until you turn the ignition
switch to ON (ll) or START (lll) again. When the
PCM detects a malfunction with the fuel pressure or
temperature, or detects a gas leak, the PCM
reduces the fuel meter to 0.
Refer to the Service Manual GX Supplement
(Section 11 , Fuel and Emissions) for specific tests
or troubleshooting procedures.
a
a

-25. CW Transmission Solenoid
- Gray- Lower front of transmission- On engine wire harness
1
2 GRNAVHT (H LC LS +)
3 BLUAVHT (SH LS +)
4 YEL (SC LS +)
5
6
7
8
GRN/BLK (SOL IN H)
PNK/BLK (HLC LS _)
GRN|VEL (SH LS -)
PNK/BLU (SC LS _)
26. Interlock Control Unit
- Gray- Behind left side oJ dash, right of steering column- On main wire harness
1
7
2
3
4
WHT/BLU (Key interlocksolenoid control)
YEL (lgnition input)
YEUBLK (Shift locksolenoid control)
BLK (G401)
WHT (Key
interlock switch input)
BLKBLU (Park lnput)
WHT/RED (Shinlock circuit control)
WHI/BLK(Park pln switch input)
6
7
27. C352
- Gray- On bottom of under-hood {use/relay box- On main wire harness
1
789
I
1
2
3
4
GRN (Fans)
BLUAVHT (fuC
compressor controlS)
WHT/BLK(Hazard warning lights)
WHT/BLK (Fuse 42)
BLKRED (A/Ccompressor clutchrelay control)
BLK,/YEL (Fuse 17)
WHT/GRN (Fuse 52)
WHT (Fuse 48)
6
7
8
I
28. C101
- Gtay- Left rear of engine compartment- Connecls engine wire harness to main wire harness
1 l\,4ale - BLK/YELFemale - BLK,ryVHT(Fuse 15)
2 BLK (G101)
3 YEURED (Oilpressure indicator light)
4 *1/*4: BRN/BLK (G101)
5 YEUBLK (PGI\4,FD
6 WHT/BLU(Charging system)
7 YEL/GRN (Gauges)
I *1: BLU (lgnition
sYstem)
9 Male - BLK VHTFemale - BLKRED(Slarting system)
10 *2: BLKryEL(lgnition system)*3: Male - BLK/YELFemale - RED(lgnition system)
*1= 96-'98 models: All'99: D16Y5 with M,iT*2= '96-'97 models: All'98-'99 modelsr GX*3= '96-'98 models: All except GX*4=: '98''00 Models: GX
202-7